jquery
Having become THE essential JavaScript library of the moment, jQuery (http://jquery.com/) offers a rich set of functions and a large panel of plugins / widgets including jQuery UI as well as a variation for mobile applications (http: // jquerymobile .com /).
Widely used on the web and used in most content management systems, it separates the content and events of a web page. Its goal is to simplify the syntax and to avoid the heavy tasks of managing incompatibilities between browsers.
The developer will be seduced by its simple syntax allowing to energize his site thanks to powerful effects and AJAX calls.

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